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SCINTILLATION SPECTROMETER MEASUREMENTS OF CAPTURE GAMMA RAYS FROM NATURAL ELEMENTS. Second Quarterly Report, September 15, 1961 to December 14, 1961

Technical Report ·
OSTI ID:4811038
A compilation was made of neutron capture gamma ray spectra of naturally occurring elements, covering both the low and the high energy spectral region, using NaI(Tl) scintillation detectors. An external beam from the ARF research reactor is being used as a source of thermal neutrons for this compilation. lmprovements were made to the detection system and experiments were conducted to determine the most suitable crystal sizes to obtain the low energy (less than approximately 1 Mev) capture spectra. To expedite energy calibrations in this low energy region, a set of secondary energy standards were produced from the rhodium and samarium capture spectra; the cadmium capture spectrum is a primary energy standard. Low energy capture gamma ray spectra of scandium, cobalt, rhodium, silver, cadmium, indium, dysprosium, holmium, thulium, ytterbium, lutetium, rhenium, and gold were obtained using the 3" x 3" NaI(Tl) detector. Many previously unreported lines were observed in these spectra. (auth)
Research Organization:
Illinois Inst. of Tech., Chicago. Armour Research Foundation
NSA Number:
NSA-16-008162
OSTI ID:
4811038
Report Number(s):
ARF-1193-6
Country of Publication:
United States
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION
ARR
CADMIUM
CAPTURE
CARBON 12
COBALT
COINCIDENCE METHODS
CONFIGURATION
CRYSTALS
DYSPROSIUM
EFFICIENCY
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GAMMA DETECTION
GAMMA RADIATION
GOLD
HOLMIUM
INDIUM
INELASTIC SCATTERING
LUTETIUM
MEASURED VALUES
NEUTRON SOURCES
NUCLEAR REACTIONS
OXYGEN 16
PHYSICS
PROTON BEAMS
PROTONS
RESEARCH REACTORS
RESONANCE
RHENIUM
RHODIUM
SAMARIUM
SCANDIUM
SCATTERING
SCINTILLATION COUNTERS
SILVER
SPECTRA
SPECTROMETERS
STANDARDS
TARGETS
THERMAL NEUTRONS
THULIUM
YTTERBIUM